BS EN 317 1993

BRITISH STANDARD Particleboards and fibreboards — Determination of swelling in thickness after immersion in water The European Standard EN 317:1993 has the status of a British Standard UDC 674.03:674.815:674.817:620.192.53 BS EN 317:1993 BS EN 317:1993 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Belgium Denmark Finland France Germany Greece Iceland Ireland Italy Luxembourg Netherlands Norway Portugal Spain Sweden Switzerland United Kingdom This British Standard, having been prepared under the direction of the Technical Sector Board for Building and Civil Engineering (B/-), was published under the authority of the Standards Board and comes into effect on 15 April 1993 © BSI 07-1999 The following BSI references relate to the work on this standard: Committee reference B/541 Draft for comment 90/16001 DC ISBN 580 21136 Oesterreichisches Normungsinstitut Institut belge de normalisation Dansk Standardiseringsraad Suomen Standardisoimisliito, r.y Association franỗaise de normalisation Deutsches Institut für Normung e.V Hellenic Organization for Standardization Technological Institute of Iceland National Standards Authority of Ireland Ente Nazionale Italiano di Unificazione Inspection du Travail et des Mines Nederlands Normalisatie-instituut Norges Standardiseringsforbund Instituto Portugs da Qualidade Asociación Espola de Normalización y Certificación Standardiseringskommissionen i Sverige Association suisse de normalisation British Standards Institution Amendments issued since publication Amd No Date Comments BS EN 317:1993 Contents Cooperating organizations National foreword Foreword Text of EN 317 National annex NA (informative) Committees responsible National annex NB (informative) Cross-reference © BSI 07-1999 Page Inside front cover ii Inside back cover Inside back cover i BS EN 317:1993 National foreword This British Standard has been prepared under the direction of the Technical Sector Board for Building and Civil Engineering and is the English language version of EN 317:1993 Particleboards and fibreboards — Determination of swelling in thickness after immersion in water, published by the European Committee for Standardization (CEN) EN 317 was produced as a result of international discussion in which the UK took an active part The principle of the method is technically equivalent to A.7 of BS 1142:1989 Specification for fibre building boards and to clause 19 of BS 5669-1:1989 Particleboard — Part Methods of sampling, conditioning and test, both of which will be withdrawn in due course A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application Compliance with a British Standard does not of itself confer immunity from legal obligations Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages to 6, an inside back cover and a back cover This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover ii © BSI 07-1999 EUROPEAN STANDARD EN 317 NORME EUROPÉENNE February 1993 EUROPÄISCHE NORM UDC 674.03:674.815:674.817:620.192.53 Descriptors: Particleboard, fibreboard, cement-bonded particleboard, test method, swelling in thickness, immersion test English version Particleboards and fibreboards — Determination of swelling in thickness after immersion in water Panneaux de particules et panneaux de fibres — Détermination du gonflement en épaisseur après immersion dans l’eau Spanplatten und Faserplatten — Bestimmung der Dickenquellung nach Wasserlagerung This European Standard was approved by CEN on 1992-12-15 CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © 1993 Copyright reserved to CEN members Ref No EN 317:1993 E EN 317:1993 Foreword This European Standard was prepared by Working Group “Particle-boards” (Secretariat: Germany) and Working Group “Fibreboards” (Secretariat: Italy) of Technical Committee CEN/TC 112 “Wood-based panels” (Secretariat: Germany) This standard is one of a series specifying methods of test for determining the properties of particleboards and fibreboards No existing European Standard is superseded This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 1993, and conflicting national standards shall be withdrawn at the latest by December 1994 In accordance with the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom Contents Foreword Scope Normative references Principle Apparatus Test pieces Procedure Expression of results Test report Annex A (informative) Bibliography Figure — Test piece for the measurement of swelling in thickness Page 3 3 3 4 © BSI 07-1999 EN 317:1993 Scope 5.3 Conditioning This European Standard specifies a method of determining the swelling in thickness of flat-pressed or drum-pressed particleboards, fibreboards, and cement-bonded particleboards The test pieces shall be conditioned to constant mass in an atmosphere with a mean relative humidity of (65 ± 5) % and a temperature of (20 ± 2) °C Constant mass is considered to be reached when the results of two successive weighing operations, carried out at an interval of 24 h, not differ by more than 0,1 % of the mass of the test piece Normative references This European Standard incorporates by dated or undated reference, provisions from other publications These normative references are cited at the appropriate places in the text and the publications are listed hereafter For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision For undated references the last edition of the publication referred to applies EN 325, Wood-based panels — Determination of dimensions of test pieces EN 326-1, Wood-based panels — Sampling, cutting and inspection EN 326-1, Sampling and cutting of test pieces and expression of test results1) Procedure 6.1 Thickness measurement The thickness of each test piece shall be measured to an accuracy of ± 0,01 mm at the intersection of the diagonals, according to EN 325 (Figure 1) Principle Swelling in thickness is determined by measuring the increase in thickness of the test piece after complete immersion in water Apparatus 4.1 Micrometer Micrometer, according to EN 325 4.2 Water bath A thermostatically controlled water bath, capable of maintaining a temperature of (20 ± 1) °C and in which the test pieces can be maintained in the conditions specified in 6.2 Test pieces 5.1 Sampling Sampling and cutting of the test pieces shall be carried out according to EN 326-1 5.2 Dimensions The test pieces shall be square with a side length of (50 ± 1) mm 1) Figure — Test piece for the measurement of swelling in thickness 6.2 Immersion Immerse the test pieces with their faces vertical in clean, still water, having a pH of ± and a temperature of (20 ± 1) °C This temperature shall be maintained throughout the test period During the test, the test pieces shall be separated from each other and from the bottom and the sides of the water bath The upper edges of the test pieces shall be covered by (25 ± 5) mm of water throughout the test The water shall be changed after each test The immersion times shall be as specified by the individual standards for the different board types 6.3 Further procedure After the immersion time has elapsed, take the test pieces out of the water, remove excess water and measure the thickness of each test piece (6.1) At present in the draft stage © BSI 07-1999 EN 317:1993 Expression of results 7.1 For each test piece The swelling in thickness of each test piece, Gt, expressed as a percentage of original thickness shall be calculated according to the following formula: t2 – t1 G t = × 100 t1 where t1 is the thickness of the test piece before immersion, in millimetres; t2 is the thickness of the test piece after immersion, in millimetres Swelling in thickness shall be expressed to one decimal 7.2 For a board The swelling in thickness of a board is the arithmetic mean of the results of all test pieces taken from that board and shall be expressed in percentage, to one decimal Test report According to EN 326-1 Additionally: The results of this test, including the time of immersion © BSI 07-1999 EN 317:1993 Annex A (informative) Bibliography EN 300, Particleboards: Oriented Strand Boards (OSB)2) EN 309, Wood particleboards — Definition and classification EN 312-2, Particleboards — Specifications — Part 2: Requirements for general purpose boards2) EN 312-3, Particleboards — Specifications — Part 3: Requirements for boards for use in interior fitments (including furniture) in dry conditions2) EN 312-4, Particleboards — Specifications — Part 4: Requirements for load-bearing boards for use in dry conditions2) EN 312-5, Particleboards — Specifications — Part 5: Requirements for load-bearing boards for use in humid conditions2) EN 312-6, Particleboards — Specifications — Part 6: Requirements for heavy-duty load-bearing boards for use in dry conditions2) EN 312-7, Particleboards — Specifications — Part 7: Requirements for heavy-duty load bearing boards for use in humid conditions2) EN 316, Wood fibreboards — Definition, classification and symbols EN 622-2, Fibreboards — Specifications — Part 2: Requirements for hardboards2) EN 622-3, Fibreboards — Specifications — Part 3: Requirements for medium boards2) EN 622-4, Fibreboards — Specifications — Part 4: Requirements for softboards2) EN 622-5, Fibreboards — Specifications — Part 5: Requirements for dry process fibreboards2) EN 633, Cement-bonded particleboards — Definition and classification2) EN 634-1, Cement-bonded particleboards — Specifications — Part 1: General requirements2) 2) At present in the draft stage © BSI 07-1999 blank BS EN 317:1993 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by the Technical Sector Board for Building and Civil Engineering (B/-) to Technical Committee B/541, upon which the following bodies were represented: American Plywood Association Association of British Plywood and Veneer Manufacturers British Woodworking Federation Chartered Institute of Building Coordinator for Timber and Timber Products Council of the Forest Industries of British Columbia Department of the Environment (Timber Division, Building Research Establishment) Fibre Building Board Organisation (FIDOR) Finnish Plywood International Flat Roofing Contractors Advisory Board Forestry Commission Furniture Industry Research Association Institution of Structural Engineers National Federation of Roofing Contractors National Housebuilding Council National Panel Products Association Royal Institute of British Architects Timber Research and Development Association Timber Trade Federation United Kingdom and Ireland Particleboard Association Coopted member National annex NB (informative) Cross-reference Publication referred to Corresponding British Standard EN 325:1993 BS EN 325:1993 Wood-based panels — Determination of dimensions of test pieces © BSI 07-1999 BS EN 317:1993 BSI — British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter Revisions British Standards are updated by amendment or 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Cross-reference Publication referred to Corresponding British Standard EN 325 :1993 BS EN 325 :1993 Wood-based panels — Determination of dimensions of test pieces © BSI 07-1999 BS EN 317: 1993 BSI —... may have had amendments incorporated This will be indicated in the amendment table on the inside front cover ii © BSI 07-1999 EUROPEAN STANDARD EN 317 NORME EUROPÉENNE February 1993 EUROPÄISCHE... Standardiseringskommissionen i Sverige Association suisse de normalisation British Standards Institution Amendments issued since publication Amd No Date Comments BS EN 317: 1993 Contents Cooperating organizations